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HL: Fachverband Halbleiterphysik

HL 20: Poster I

HL 20.61: Poster

Dienstag, 10. März 2026, 18:00–20:00, P1

Dry transfer of 2D van der Waals heterostructures for quantum sensing — •Timo Strobl, Korbinian Felber, Paul Konrad, Andreas Sperlich, and Vladimir Dyakonov — Experimental Physics 6, University of Würzburg, 97074 Würzburg, Germany

A highly dynamic research area is dedicated to the development of quantum sensors based on solid-state spin defects. This field was previously focused on three-dimensional (3D) material systems, which posed challenges in positioning spin centers close to the sample surface. The recent discovery of V_B⁻ spin defects in the 2D van der Waals (vdW) material hexagonal boron nitride (hBN) provided a new approach to overcome this inherent positioning limitation. These defects are suitable for sensing local magnetic fields, temperature, and lattice strain when utilizing the method of optically detected magnetic resonance (ODMR). Hence, these functional hBN layers constitute a powerful tool for investigating fundamental 2D material properties.

To apply the potential in this area, the fabrication of a van der Waals heterostructure is necessary, combining the spin-active hBN with another 2D material. The precise fabrication by stacking these multilayer 2D materials via established dry-transfer polymer techniques is an essential prerequisite for such quantum sensor structures. The preparation procedures presented here provide essential insights required to implement in situ quantum sensing of 2D materials utilizing hBN.

Keywords: heterostructures; hexagonal boron nitride; quantum sensing; negatively charged boron vacancy; 2D materials